Last week I came across a post on the ‘Adsense Blog’ – and it cleared up my confusion regarding Adsense earning. Google Adsense program is wiser than a layman thinks. You start earning more when you start getting healthy clicks! Quoting from the Adsense Blog:
If your website performs well for advertisers, there may be increased competition [...]

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Google uses several user-agents. Using the bot name, you can block access or track any user-agent easily.

Googlebot: crawl pages from web index and news index
Googlebot-Mobile: crawls pages for mobile index
Googlebot-Image: crawls pages for image index
Mediapartners-Google: crawls pages to determine AdSense content. Only used to crawl your site if AdSense ads are displayed on your site
Adsbot-Google: [...]

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Google Sitemaps allows you to provide additional information about your pages, including when they were last updated, so that the crawler exactly knows when does the page need to be indexed again. It is also useful for websites that have content which may other wise be ignored, such as flash based navigation interfaces etc.
To create [...]

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Often your page displays irrelevant advertisement specially when there are many topics on a single page. In such case, use Google’s section targeting technique. Implementation is very simple. You just need to place an HTML tag over the content that either needs more attention or needs to be ignored. Like Google states:
To implement section targeting, [...]

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Ever wanted to know when Google crawls your website? Here is a simple PHP script which emails you whenever GoogleBot crawls your site.
<?php
if(strpos($_SERVER['HTTP_USER_AGENT'], 'Googlebot') !== false)
{
$email = 'you@domain.com';
mail($email,'Googlebot Alert', 'Googlebot has crawled your page: '.$_SERVER['REQUEST_URI']);
}
?>

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Try out this tool to maximize your Adwords and/or Adsense performance.
According to Google:
“The Keyword Tool is a great way to find new keywords for your ad campaigns. For example, if you run a budget hotel, the Keyword Tool can suggest helpful related keywords like “hotel discounts” or “motels.” Adding these alternate terms to your ad [...]

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Search engines use web crawler (spider/robot) which browses WWW in an automated manner to provide up-to-date data. But what if one doesn’t want to get listed? Yes, “robots.txt” comes into play when you have to set your own trend whether to allow bots or prevent your site from being crawled!
Place robots.txt in your root directory [...]

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